Brian Williams raps Rapper's Delight on the Tonight Show: Brian Williams made an pseudo-appearance on The Tonight Show. Jimmy Fallon edited footage of him to make it sound like he was rapping Rapper’s Delight. #tv #funny #music #rap #LesterHolt #KathieLeeGifford #tonightshow #jimmyfallon http://l7world.com/2014/02/brian-williams-raps-rappers-delight-tonight-show-starring-jimmy-fallon.html